300mm Five wings PDC drills bolt drill bit /PDC drill bit for coal well engineering drill bit 300mm

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4 Wings Non-coring Enhanced Step Scrape Arc Pdc Drill Bit for Coal Mine Water Well Drilling Geological

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113mm-275mm Four Wings Step Drill Bit Well Drilling PDC Drag Bit For Mining Drilling Bit Geological Exploration Coal Mining

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200mm Three Wings PDC Drag Bits Water Well Bit Hard Rock Drill Bit Coal Mine Geological Exploration

220mm - 325mm 4 wings PDC concave core drilling bit well rock coal dril tool geological prospecting bit for 50 hole drill pipe

DIY Customization 5 Wings Step Concave Diamond PDC Non-Core Drag Drill Bit For Coal Mining Water Well And Oil

113mm 152mm 180mm 275mm 4 Wings Step Drill Bit Well Drilling PDC Drag Bit Mining Drilling Bit Geological Exploration Coal Mining

300mm 3 Wings Pdc Scraper Drill Bit For Soft Formation Drilling And Water Well Drilling

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Customized 3 Wings Pdc Bit 133 152 Water Well Drilling Tool Drill Bit Geological Exploration Coal Mining Drag Bit

4 Wings Step Drill Bit Well Drilling 113-273mm PDC Drag Bit For Mining Drilling Bit Geological Exploration Coal Mining

3 Wings Diamond Pdc Drill Bit for Coal Mining Water Well Drilling

4 Wings Non-coring Enhanced Step Scrape Arc Pdc Drill Bit for Coal Mine Water Well Drilling Geological

Water Well Drilling Coal Mining Rock 3 Wings Non Core Diamond PDC Drag Bit

113-273mm 4 Wings Step Drill Bit Well Drilling PDC Drag Bit For Mining Drilling Bit Geological Exploration Coal Mining

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3 Wings Diamond Pdc Drill Bit for Coal Mining Water Well Drilling

3 wing/4 wings diamond PDC concave drill bit/Non coring PDC drill bit for well/coal mine drill bit

153-300mm PDC drill bits for rock drilling in engineering blasting,mining,water well and construction engineering.

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